Colouring Triangles

What do you see below?


     

What do you notice?
What is the same and what is different about the two pictures?

Now, it is your turn to colour!
Explore ways of colouring the black and white outline of the triangles:

Can you make symmetrical patterns? With two colours? Three colours?
More than three colours?

You may like to use the interactivity below to try out your ideas. This sheet of blank triangles might also be useful.

We would love to see the triangles you create.  Do send them in along with your explanation of how you know the pattern is symmetrical.